burst (one's) bubble

To bring someone back to reality, especially if they are dreaming or fantasizing about something unrealistic. Look, I hate to burst your bubble, but there is no way you're getting into Harvard! You're a C student!

Common Names:

Name	Pronounced	Usage
Gavriilu	-	Old Church Slavic
Crowley	['krəuli:]
Halldor	-	Norwegian
Jaromir	yah-RAW-meer	Polish
Sydnie	SID-nee	English (Modern)
Atanas	-	Bulgarian, Macedonian